Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Smart Shear from Siemens VAI – a New Hydraulically Operated Plate Shear for Improved Cutting Quality and Increased Cutting Speed

15.10.2008
Siemens VAI Metals Technologies has developed a new hydraulically operated rolling blade shear for cutting applications in heavy-plate rolling mills. Compared to conventional mechanical shears, “Smart Shear” is intended to improve cutting quality, increase the cutting speed, simplify maintenance and enable greater flexibility. The Smart Shear concept is suitable for use as a crop shear or a divide shear.

Due to the rising demand for high-strength types of steel and for plates with a greater thickness and width, the requirements placed on plate mill shears have increased dramatically. The shears and their components are being subjected to much greater forces. At the same time, uneven cuts or imprecisely cut edges have to be avoided. The mechanically operated shears available on the market are at the limit of their capabilities.

In the case of Smart Shear, servo-controlled hydraulic cylinders are used on both sides of the shears in order to operate the top blade. A rolling cut action is therefore possible without the gears, shafts and cranks needed for mechanical shears. The top knife and the bottom knife are mounted directly on the blade beams. This reduces the number of moving parts and thus susceptibility to wear as well as the need for maintenance. Simulations have demonstrated a considerably better control of cutting angle and blade overlap compared to mechanical shears. The servo-controlled movement of the shears ensures that the correct cutting angle is achieved for all plate thicknesses.

The blade overlap is kept practically constant over the entire width of the plate. This improves the cutting quality. Moreover, the blade overlap can easily be adapted to the optimum value for the respective thickness and width by means of the control software. In addition, the Smart Shear concept enables higher cutting speeds than mechanical shears. The cutting speed of mechanical shears cannot easily be increased because the larger torque needed for increasing the speed requires a design that, in turn, increases the inertia of the drive system.

In order to improve operational flexibility, Smart Shear is equipped with two pairs of hydraulic cylinders. Both pairs of cylinders are used at the same time for cutting high-strength or thick metal plates. When thin plates or lower-strength material has to be cut, only one pair of cylinders is used. The cutting speed can easily be adapted to the requirements in each case.

The hydraulic cylinders are operated in tension. As a result, the vertical forces are constrained within the top and bottom knife beams and the cylinders. The side frames are not subjected to the vertical forces. They only have to withstand the horizontal blade forces and thus can be much lighter.

The Siemens Industry Sector (Erlangen, Germany) is the world's leading supplier of production, transportation and building systems. Integrated hardware and software technologies combined with comprehensive industry-specific solutions enable Siemens to enhance the productivity and efficiency of its customers in industry and infrastructure. The Sector comprises six Divisions: Building Technologies, Industry Automation, Industry Solutions, Mobility, Drive Technologies and Osram. In fiscal 2007 (ended September 30), Siemens Industry generated sales of approximately EUR40 billion (pro forma, unconsolidated) with around 209,000 employees worldwide.

With the business activities of Siemens VAI Metal Technologies, (Linz, Austria), Siemens Water Technologies (Warrendale, Pa., U.S.A.), and Industry Technologies, (Erlangen, Germany), the Siemens Industry Solutions Division (Erlangen, Germany) is one of the world's leading solution and service providers for industrial and infrastructure facilities.

Using its own products, systems and process technologies, Industry Solutions develops and builds plants for end customers, commissions them and provides support during their entire life cycle.

Dr. Rainer Schulze | Siemens Industry Solutions
Further information:
http://www.siemens.com/metals
http://www.siemens.com/industry
http://www.siemens.com/industry-solutions

More articles from Machine Engineering:

nachricht It Takes Two: Structuring Metal Surfaces Efficiently with Lasers
15.03.2017 | Fraunhofer-Institut für Lasertechnik ILT

nachricht FOSA LabX 330 Glass – Coating Flexible Glass in a Roll-to-Roll Process
07.03.2017 | Fraunhofer-Institut für Organische Elektronik, Elektronenstrahl- und Plasmatechnik FEP

All articles from Machine Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Giant Magnetic Fields in the Universe

Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.

The results will be published on March 22 in the journal „Astronomy & Astrophysics“.

Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...

Im Focus: Tracing down linear ubiquitination

Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.

Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...

Im Focus: Researchers Imitate Molecular Crowding in Cells

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

Argon is not the 'dope' for metallic hydrogen

24.03.2017 | Materials Sciences

Astronomers find unexpected, dust-obscured star formation in distant galaxy

24.03.2017 | Physics and Astronomy

Gravitational wave kicks monster black hole out of galactic core

24.03.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>